I use these Akro-Mils 10144 D sets of drawers to keep my various electronics components organized. They’re cheap, reasonable quality, but most importantly inexpensive.
Something that I find myself doing a lot is transferring individual drawers around. For example, I have a specific drawer that holds short jumper wires for breadboards. Sometimes I bring this drawer up to campus for working in the lab. Same goes for my misc-resistor drawer. It’s much easier to move the drawer rather than re-packing it.
The problem is that these are open drawers! They don’t have lids, so what I’ll do is put it in a ziplog bag and throw it into my backpack. This is a bad solution, I have a 3D printer, time to get CADing.
I wanted the drawer to be able to lock in place, so it wouldn’t slide out of the holder while in transit, here is a video of the locking mechanism in action:
As I iterated on this design, it became clear that I could get away with a pretty thin wall thickness, and that extending the slot cut made it much much easier to flex the locking mechanism, so the grab point on the outer surface became unnecessary.
Annoyingly, I couldn’t figure out a good solution to be able to use this part without having to use supports.